Rhododendron tomentosum
Rhododendron
azalea, rhododendron
erect, glabrous or pubescent.
alternate; thin or leathery;
margins entire to minutely serrate; plane to revolute;
buds usually large with overlapping scales;
petioles present.
terminal or axillary; corymbs or rounded racemes.
bisexual, bilaterally or radially symmetric;
sepals 5;
corollas campanulate or funnelform;
petals 5;
stamens 5–12, included or exserted;
filaments unequal;
anthers without awns, dehiscent by pores;
ovaries superior;
styles curved;
stigmas capitate.
capsules, elongate.
many; minute, with or without tails, winged.
Rhododendron tomentosum
Rhododendron
Worldwide, except Africa. ~1000 species; 4 species treated in Flora.
Although, for several decades, evidence has suggested that the genus Ledum should be placed within Rhododendron (Kron & Judd 1990), many contemporary floras have continued to treat the genera separately. Here, we have chosen to merge the genera. Rhododendron groenlandicum has long been assumed to exist in Oregon. This is based on a lone specimen, presumably collected on “Russian Island” in the mid-19th century (the specimen is housed at the Wake Forest University Herbarium). Aside from this specimen, no evidence of this species’ existence in Oregon has been documented.
Stephen Meyers
BC
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
CA
OR
WA
